Go to a top level page (collection). In this case it's a blog
Have the inspector open. Make sure you're showing it on the Menu, by clicking the second tab on the inspector and having Include page in: Menu as checked
To create subpages with dropdown menu links, you need to add these pages to the menu list
- Click on the first subpage
- Open the inspector and click on the second (page) tab
- You will need to click on the Include page in: Menu as: checkbox.
- You may rename the page if necessary
Do this for all your submenu pages
And you'll see them all move. If some menu items are further nested, you can create multilevel menus. But in general, don't.